what are you usually doing when it shuts down? how long does it keep working before shutting down? (if it's after a few minutes then open the case & check if cpu fan is working) usually it's a cpu overheating & it could seriously harm the cpu if you keep using it in this condition. it's still under warranty so u can call the customer support people too.

if it comes with a windows pre-installed then look into the start menu & search for some utility that let's u monitor cpu fan speed & temperature.if there is none, go to the computer or motherboard manufacturer's web site & search for a kind of probe software that does the same thing.

you may eventually need to try 2 things: put some thermal paste between cpu & heat sink to help with heat conduction. (http://www.arcticsil...structions.htm)if that didn't help, you may need a more powerful cpu fan.

what are you usually doing when it shuts down? how long does it keep working before shutting down? (if it's after a few minutes then open the case & check if cpu fan is working) usually it's a cpu overheating & it could seriously harm the cpu if you keep using it in this condition. it's still under warranty so u can call the customer support people too.

if it comes with a windows pre-installed then look into the start menu & search for some utility that let's u monitor cpu fan speed & temperature.if there is none, go to the computer or motherboard manufacturer's web site & search for a kind of probe software that does the same thing.

you may eventually need to try 2 things: put some thermal paste between cpu & heat sink to help with heat conduction. (http://www.arcticsil...structions.htm)if that didn't help, you may need a more powerful cpu fan.

Thanks Amir, I called customer support and they took it back, i'll let them sort it but thanks anyway.